Yes, 图纸王-CAD看3D图纸&2D看图软件 is free to download, however it contains in-app purchases or subscription offerings.
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图纸王-CAD看3D图纸&2D看图软件 has several in-app purchases/subscriptions, the average in-app price is €237.70.
To get estimated revenue of 图纸王-CAD看3D图纸&2D看图软件 app and other AppStore insights you can sign up to AppTail Mobile Analytics Platform.